Heat dissipating device having colored lighting and persistence effect

ABSTRACT

A heat dissipating device includes a bottom assembly, a first light guide positioned on the bottom assembly, a first light assembly positioned on the first light guide, and an outer cover positioned on the bottom assembly and at least partially enclosing the bottom assembly, the first light guide, and the first light assembly. The outer cover defines a first opening on a top surface thereof, at least a portion of the first light guide is received in the first opening, and light from the first light assembly is emitted from the heat dissipating device through the exposed portion of the first light guide.

BACKGROUND Field

Embodiments disclosed are related to heat dissipation devices, and moreparticularly, to heat dissipating devices having light emitting devices.

Description of Related Art

With the increase of the processing speed and performance of electroniccomponents, such as central processing units (CPU), the amount of heatgenerated during operation of the electronic component increases. Theheat generation increases the temperature of the electronic componentand, if the heat cannot be dissipated effectively, the reliability andperformance of the electronic component is reduced. To preventoverheating of the electronic component, typically, a heat dissipatingdevice is used for cooling the electronic component and, therebymaintain normal operation of the electronic component.

Users of computers usually spend long time at a task, and thus can befatigued. As such, it is generally desirable to provide a computerhousing with an aesthetically pleasing appearance to provide a morerelaxed environment for the user.

SUMMARY

Various aspects of the present disclosure provide a heat dissipatingdevice for dissipating heat generated by electronic components.

According to one aspect of the present disclosure, the heat dissipatingdevice includes a bottom assembly, a first light guide positioned on thebottom assembly, a first light assembly positioned on the first lightguide; and an outer cover positioned on the bottom assembly and at leastpartially enclosing the bottom assembly, the first light guide, and thefirst light assembly The outer cover defines a first opening on a topsurface thereof, at least a portion of the first light guide is receivedin the first opening, and light from the first light assembly is emittedfrom the heat dissipating device through the exposed portion of thefirst light guide.

According to another aspect of the present disclosure, the heatdissipating device includes a bottom assembly, a first light guidepositioned on the bottom assembly and including a circular protrusion onan upper surface thereof and two curved protrusions extending radiallyfrom an outer circumferential end of the first light guide, a firstlight assembly positioned on the first light guide; and an outer coverpositioned on the bottom assembly and at least partially enclosing thebottom assembly, the first light guide, and the first light assembly.The outer cover defines a first opening on a top surface thereof, anddefines a second opening and a third opening on an outer circumferentialsurface of the outer cover and adjacent the top surface, at least aportion of the first light assembly is received in the first opening,the two curved protrusions are received in a corresponding one of thesecond opening and the third opening, and light from the first lightassembly is emitted from the heat dissipating device through the portionof the first light assembly in the first opening and through the twocurved protrusions.

According to another aspect of the present disclosure, the heatdissipating device includes a bottom assembly, a first light guidepositioned on the bottom assembly and including a circular protrusion onan upper surface thereof and two curved protrusions extending radiallyfrom an outer circumferential end of the first light guide, a firstlight assembly positioned on the first light guide, a second light guideincluding a first curved part and a second curved part each disposed inthe bottom assembly, a second light assembly disposed on the secondlight guide, and an outer cover positioned on the bottom assembly and atleast partially enclosing the bottom assembly, the first light guide,the first light assembly, the second light guide, and the second lightassembly. The outer cover defines a first opening on a top surfacethereof, a second opening and a third opening on an outercircumferential surface of the outer cover and adjacent the top surface,and a fourth opening and a fifth opening on the outer circumferentialsurface of the outer cover and adjacent a lower end of the outer cover,at least a portion of the first light assembly is received in the firstopening, the two curved protrusions are received in a corresponding oneof the second opening and the third opening, the first and second curvedparts are received in a corresponding one of the fourth opening and thefifth opening, and light from the first light assembly is emitted fromthe heat dissipating device through the portion of the first lightassembly in the first opening, through the two curved protrusions, andthrough the first and second curved parts.

According to another aspect of the present disclosure, the heatdissipating device includes a bottom assembly, a first light guidepositioned on the bottom assembly, a first light assembly positionedadjacent a circumferential end surface of the first light guide, and anouter cover positioned on the bottom assembly and at least partiallyenclosing the bottom assembly, the first light guide, and the firstlight assembly. The outer cover defines a first opening on a top surfacethereof, at least a portion of the first light guide is received in thefirst opening, and light from the first light assembly is emitted fromthe heat dissipating device through the portion of the first light guidereceived in the first opening.

According to another aspect of the present disclosure, the heatdissipating device includes a bottom assembly, a first light guidepositioned on the bottom assembly, a first light assembly positioned onthe first light guide, and an outer cover positioned on the bottomassembly and at least partially enclosing the bottom assembly, the firstlight guide, and the first light assembly. The outer cover defines afirst opening on a top surface thereof, at least a portion of the firstlight guide is received in the first opening, and light from the firstlight assembly is emitted from the heat dissipating device through theexposed portion of the first light guide. The bottom assembly includesan inlet unit fluidly coupled to an inlet of the heat dissipatingdevice, and a base including a stator portion and a rotor portion, therotor portion including a plurality of blades disposed on a top circularplate of the rotor portion. Two of (1) the plurality of blades, (2) aninner circumferential surface of the inlet unit and a top surface of arim of the inlet unit, and (3) the top circular plate have contrastingcolors with respect to each other.

BRIEF DESCRIPTION OF THE DRAWINGS

The following figures are included to illustrate certain aspects of theembodiments, and should not be viewed as exclusive embodiments. Thesubject matter disclosed is capable of considerable modifications,alterations, combinations, and equivalents in form and function, as willoccur to those skilled in the art and having the benefit of thisdisclosure.

FIG. 1 is a perspective view of an exemplary heat dissipating device,according to embodiments disclosed.

FIGS. 2A, 2B, and 3 are exploded views of the heat dissipating device ofFIG. 1, according to embodiments disclosed.

FIGS. 4 and 5 are exploded views of the bottom assembly of FIG. 1,according to embodiments disclosed.

FIGS. 6 and 7 are exploded views of the heat exchange unit of FIG. 1,according to embodiments disclosed.

FIG. 8 illustrates a cross-sectional view of the heat dissipating deviceof FIG. 1 taken along the line 8-8.

FIG. 9 schematically illustrates a circuit board included in the lightassembly, according to embodiments disclosed.

FIG. 10 shows a schematic circuit for controlling an operation of theplurality of light sources, according to embodiments disclosed.

FIGS. 11A-12B are photos respectively illustrating modes of operation ofthe fan according to embodiments of the present disclosure.

FIG. 13 shows flowchart of a method of controlling the heat dissipatingdevice of FIG. 1 using the circuit illustrated in FIG. 10

FIG. 14 shows a schematic circuit of the heat dissipating device,according to embodiments disclosed.

FIG. 15 shows flowchart of a method of controlling the heat dissipatingdevice of FIG. 1 having the circuit of FIG. 14.

FIG. 16 shows a schematic circuit of the heat dissipating device of FIG.1, according to embodiments of the present disclosure.

FIG. 17 shows a flowchart of a method of controlling the heatdissipating device of FIG. 1 having the circuit of FIG. 16.

FIG. 18 shows a schematic circuit of the heat dissipating device of FIG.1, according to embodiments of the present disclosure.

FIG. 19 shows a flow chart of a method of controlling the heatdissipating device of FIG. 1 having the circuit of FIG. 18.

FIG. 20 shows a modified circuit of a heat dissipating device of FIG. 1according to embodiments of the present disclosure, based on the circuitshown in FIG. 18.

FIG. 21 shows flowchart of a method of controlling the heat dissipatingdevice of FIG. 1 having the circuit of FIG. 20

FIG. 22 illustrates an exemplary heat dissipating device, according toembodiments disclosed.

FIGS. 23 and 24 illustrate exploded views of the heat dissipating deviceof FIG. 22, according to embodiments disclosed.

FIG. 25 illustrates a cross-sectional view of the heat dissipatingdevice of FIG. 22 taken along the line 25-25.

FIG. 26 illustrates an exemplary heat dissipating device, according toembodiments disclosed.

FIGS. 27 and 28 illustrate exploded views of the heat dissipating deviceof FIG. 26, according to embodiments disclosed.

FIG. 29 illustrates an exploded view of the bottom assembly in FIGS. 27and 28 illustrating the second light guide of FIGS. 27 and 28 in greaterdetail, according to embodiments disclosed.

FIGS. 30 and 31 illustrate the second light assembly and the secondlight guide separated from the heat exchange unit.

FIG. 32 illustrates a cross-sectional view of the heat dissipatingdevice of FIG. 26 taken along the line 32-32.

DETAILED DESCRIPTION

Embodiments described herein are directed to a computer housing havingremovable components for changing an appearance thereof as desired by auser.

FIG. 1 is a perspective view of an exemplary heat dissipating device100, according to embodiments disclosed. Referring to FIG. 1, the heatdissipating device 100 includes a bottom assembly 102 having an inlet104 and an outlet 106 each fluidly coupled to the bottom assembly 102.The heat dissipating device 100 includes an outer cover 112 that formsthe top portion of the heat dissipating device 100 and the bottomassembly 102 may be received within the outer cover 112. In anembodiment, the outer cover 112 is made of, for example, but not limitedto, a transparent or translucent material that permits light to passtherethrough. For example, the outer cover 112 is made of glass,plastic, a combination thereof, and the like.

FIGS. 2A, 2B, and 3 are exploded views of the heat dissipating device100, according to embodiments disclosed. As illustrated, the heatdissipating device 100 includes a stacked arrangement of the bottomassembly 102, a glass cover 114, a light guide 116, a light assembly118, and the outer cover 112. The bottom assembly 102 includes a heatexchange unit 110 and a pumping unit 108 disposed on the heat exchangeunit 110 and fluidly coupled thereto. As discussed below, the inlet 104and the outlet 106 are also fluidly coupled to the heat exchange unit110 and the pumping unit 108. The glass cover 114 is disposed on thepumping unit 108. In an embodiment, the glass cover 114 limits watervapor generated in the bottom assembly 102 from reaching the light guide116. Specifically, referring to FIG. 3, the glass cover 114 is receivedin the bottom portion of the light guide 116. When assembled, the lightguide 116 is disposed on the bottom assembly 102 and the glass cover 114is located therebetween. In an embodiment, the glass cover 114 isomitted and a thin film that is at least translucent covers the bottomportion of the light assembly 116. In another embodiment, the glasscover 114 is omitted and a thickness of the light guide 116 is increased(e.g., in the axial direction). In an example, the thickness of thelight guide 116 may be about 7 mm to about 13 mm. The increasedthickness limits water vapor generated in the bottom assembly 102 fromentering other portions of the heat dissipation device 100.

The light guide 116 has a plate shaped structure made from a transparentor translucent material so that light passes therethrough. The lightguide 116 reflects and/or transmits the light from the light assembly118. An upper surface 117 of the light guide 116 includes a circularprotrusion 115 centrally located in the upper surface 117. The lightguide 116 is coupled to the bottom assembly 102, more specifically, tothe pumping unit 108, using fasteners 123 (e.g., screws, bolts, pins,etc.) that are received in corresponding holes 127 defined in thepumping unit 108 via through-holes 125 defined in the light guide 116.

As illustrated in FIG. 2A, the light assembly 118 is an annulardisk-shaped structure (similar to a washer) that includes a plurality oflight emitting devices (discussed below with reference to FIG. 9). Thelight emitting devices may be disposed in the upper or lower surface(with reference to the orientation in FIGS. 2A and 3) of the lightassembly 118. The light assembly 118 is disposed on the light guide 116about the circular protrusion 115. In other words, the circularprotrusion 115 is received within the central opening defined in thelight assembly 118 when the light assembly 118 is disposed on the lightguide 116. The light assembly 118, and thus the plurality of lightemitting devices included therein, is stationary and does not rotatewhen the rotor portion 136 (discussed below) rotates. The light assemblyalso includes the control circuit (discussed below with reference toFIG. 9) for powering and controlling an operation of the light emittingdevices. In an embodiment, the plurality of light emitting devices maybe arranged at regular intervals on the light assembly. However, inother embodiments, the plurality of light emitting devices may bearranged at irregular (or random) intervals. In an embodiment, the lightemitting devices are light emitting diodes (LEDs). However, the lightemitting devices are not limited to LEDs and also include other types oflight emitting devices, without departing from the scope of thedisclosure. The plurality of light emitting devices may include at leastone light emitting device emitting red light, at least one lightemitting device emitting green light, and/or at least one light emittingdevice emitting blue light. Alternatively or optionally, the pluralityof light emitting devices may emit colors other than red, green, andblue. For example, the plurality of light emitting devices may includewhite color and/or yellow color light emitting devices.

FIG. 2B illustrates another embodiment of a light assembly 111,according to embodiments disclosed. The light assembly 111 has a hollowcylinder shape having vertical circumferential sidewalls 119 and acentral opening 120. The light assembly 111 may be coupled to thecircumferential end surface 109 (FIG. 2A) of the light guide 116. Thelight assembly 111 may include a plurality of light emitting devices 107disposed in the sidewalls 119 at regular or random intervals.

During operation, light from the light emitting devices in the lightassembly 111 or 118 passes through the light guide 116 is reflectedand/or transmitted by the light guide 116, thereby “filling” the lightguide with the light from the light emitting devices.

The outer cover 112 includes an opening 122 centrally located on a topsurface 121 thereof. The opening 122 is sized or otherwise configured toreceive the circular protrusion 115 when the heat dissipating device 100is assembled. When assembled, the top surface 113 of the circularprotrusion 115 is flush with the top surface 121 of the outer cover 112.The outer cover 112 includes an opening 126 defined in the outercircumferential surface 128 of the outer cover 112. The opening 126 issized or otherwise configured to receive the inlet 104 and outlet 106.When assembling, the outer cover 112 is coupled to the bottom assembly102 using a snap-fit type connection.

FIGS. 4 and 5 are exploded views of the bottom assembly 102, accordingto embodiments disclosed. Also illustrated in FIGS. 4 and 5 is anexploded view of the pumping unit 108. The pumping unit 108 houses themotor of the heat dissipating device 100. The motor is used to circulatecooling liquid within the heat dissipating device 100 for cooling anelectronic component attached thereto. The pumping unit 108 includes abase 132 having a generally cylindrical body defining a central opening133. The stator portion 134 of the motor is located in the opening 133.A gap 135 is defined between the stator portion 134 and an innercircumferential surface 131 of the base 132. The inner circumferentialsurface 131 defines a recess 141 (or a concavity) extending axially inthe gap 135. The recess 141 is fluidly coupled to an opening 147 in thebottom of the base 132.

The rotor portion 136 is disposed on the stator portion 134 and in thegap 135. The rotor portion 136 has a generally cylindrical bodyincluding a top circular plate 137 and circular sidewalls 140 coupled tothe top circular plate 137 along its circumference. A plurality ofblades 138 that impart motion to the cooling liquid in the heatdissipating device 100 are disposed on the top circular plate 137. Thecircular sidewalls 140 define a cavity that is sized or otherwiseconfigured to receive the stator portion 134.

The pumping unit 108 also includes an inlet unit 142 that is disposed onthe base 132. The inlet unit 142 includes a generally cylindrical bodyhaving a central opening 145 defined by circular (or curved) sidewall144 of the inlet unit 142. The inlet 104 of the heat dissipating device100 opens on the inner circumferential surface 143 of the sidewall 144and is in fluid communication with the opening 145. The inlet unit 142is disposed on the base 132 such that the rotor portion 136 is receivedin the opening 145.

A circular rim 150 protrudes radially inward into the opening 145 froman inner circumferential surface of the sidewall 144. The rim 150 iscoupled to the bottom of the inlet unit 142. The rim 150 defines arecess (or a concavity) 146.

The bottom assembly 102 also includes a liquid guiding unit 154 disposedin the opening 145 about the rotor portion 136 and supported by the base132. The liquid guiding unit 154 has a central opening 155 through whichcooling liquid flows into a pump chamber (see below).

When assembled, the stator portion 134 is received in the rotor portion136 and the inlet unit 142 is positioned on the base 132. The inlet unit142 and the base 132 are coupled together using fasteners 149 andcooperatively form a pump chamber of the pumping unit 108. The pumpchamber houses the stator portion 134 and the rotor portion 136. Thebase 132 forms the base (or bottom) of the pump chamber and thesidewalls 144 form the sides of the pump chamber. The recess 146 and therecess 141 are in fluid communication with each other. The inlet unit142 is coupled to the heat exchange unit 110 using fasteners 151.

FIGS. 6 and 7 are exploded views of the heat exchange unit 110,according to embodiments disclosed. The heat exchange unit 110 includesa cover plate 160 defining a through opening 162 and the outlet 106 ofthe heat dissipating device 100. The heat exchange unit 110 furtherincludes a circular base plate 164 including a heat exchanger. In anembodiment, and as illustrated, the heat exchanger includes an array ofa plurality of longitudinally extending fins 166 disposed in the centralportion of the base plate 164. However, in other embodiments, the heatexchange unit 110 may include pins, columns, or any other structure of adesired shape and size for dissipating heat, without departing from thescope of the disclosure. The fins 166 extend transversely on the baseplate 164 along the length (or width) thereof, and are arranged parallelto each other and perpendicular to the base plate 164. However, in otherembodiments, some or all of the plurality of fins 166 are non-parallelto each other and arranged on the base plate 164 at an angle less than90°. The base plate 164 (or at least a portion thereof) includes athermally conductive material, such as a metal including copper,aluminum etc., or non-metal thermally conductive material, such asgraphite etc. The fins 166 (or at least a portion thereof) also includea thermal conductive material. In an embodiment, the fins 166 and thebase plate 164 are integrally formed as a single piece. In anotherembodiment, the fins 166 are coupled to the base plate 164 using knowntechniques.

The heat exchange unit 110 also includes a sealing cover 170 having anopening 172. The opening 172 is shaped as an elongated slot extendingperpendicular (or transversely) to the fins 166. The opening 172 extendsthe entire width W of the fins 166. Referring to FIG. 7, the bottomsurface (e.g., the surface of the base plate 164 opposite to the surfacehaving the fins 166) of the base plate 164 includes a coupling area 174to which the electronic component from which heat is to be dissipated isattached. Specifically, the electronic component from which heat is tobe dissipated is attached to the bottom surface using a thermallyconductive material (e.g., thermal grease) in order to transfer the heatgenerated from the electronic component to the base plate 164.

When the heat exchange unit 110 is assembled, the sealing cover 170 isarranged on the fins 166 and coupled to the base plate 164, therebyforming a heat exchange chamber that encloses the fins 166. The sealbetween the sealing cover 170 and the base plate 164 is liquid-tightpreventing liquid in the heat exchange chamber from leaking. The coverplate 160 is coupled to the base plate 164 using fasteners 165 (FIG. 7)and such that the opening 162 is in fluid communication with the opening172.

The heat exchange unit 110 is coupled to the circuit board including theelectronic component from which heat is to be dissipated usingconnection members 176 coupled to the cover plate 160. The motor controlcircuit 178 including a circuit board for controlling the operation ofthe motor is arranged on the cover plate 160.

During operation of the heat dissipating device 100, cooling liquid isreceived into the opening 145 via the inlet 104. The liquid guiding unit154 guides the cooling liquid into the pump chamber via the opening 155.The rotor portion 136 imparts motion to the cooling liquid. The coolingliquid then flows through the recesses 146 and 141 and into the heatexchange unit 110 via the opening 147. The cooling liquid is receivedfrom the opening 147 into the heat exchange chamber via the openings 162and 172. The cooling liquid contacts the fins 166 and heat is exchangedbetween the fins 166 and the cooling liquid thereby raising thetemperature of the cooling liquid. The flow of the cooling liquid intothe heat exchange chamber due to the operation of the motor forces theheated liquid to exit the heat exchange chamber via the opening 172 andflow into an opening 171 (FIG. 7) in the cover plate 160. The opening171 is adjacent the outlet 106 of the heat dissipating device 100, andthe heated liquid exits the heat dissipating device 100 via the outlet106.

As mentioned above, during operation, the light from the light emittingdevices is reflected and/or transmitted by the light guide 116, thereby“filling” the light guide 116 with the light. The blades 138 alsoreflect the light from the light emitting devices. The flow of liquidalso disperses light. These factors result in an aesthetically pleasinglight effect. In an embodiment, the colors of the light emitting devicesare varied based on the rotating speed of the rotor portion 136. Inanother embodiment, the light emitting devices are turned ON and OFF.The frequency (referred to as the ON/OFF frequency) at which the lightemitting devices are turned ON and OFF depends on the rotationalfrequency of the rotor portion 136. During operation, by controlling thefrequency of the light emitting devices, the rotor portion 136 appearsas if the rotor portion 136 is rotating at a lower speed than the actualspeed of rotation of the rotor portion 136. This visual effect isachieved by setting the ON/OFF frequency of the light emitting devicesto be different than integer multiple of the rotating speed of the rotorportion 136. In an embodiment, the blades 138 are arched (or arcuate)structures that are curved or otherwise oriented opposite to thedirection of rotation of blades 138. In another embodiment, the topcircular plate 137, and the inner circumferential surface 143 and topsurface 153 of the rim 150 have contrasting colors with respect to eachother to increase the aesthetic effect. In an embodiment, the pluralityof blades 138 and the top circular plate 137 have contrasting colorswith respect to each other to increase the aesthetic effect. In anembodiment, the plurality of blades 138, and the inner circumferentialsurface 143 and top surface 153 of the rim 150 have contrasting colorswith respect to each other to increase the aesthetic effect. In additionto increasing the aesthetic effect, the contrasting colors improve therelative reflectance (or reflectivity) of the blades 138, the innercircumferential surfaces 131 and 143, top surface 153 of rim 150, andthe top circular plate 137. For example, if plurality of blades 138 arewhite and top circular plate 137 is black, the blades 138 reflect morelight compared to the top circular plate 137. Likewise, if the topcircular plate 137 is white and each of the inner circumferentialsurface 143 and the top surface 153 of the rim 150 are of a darker color(e.g., black), the top circular plate 137 will reflect comparativelymore light. Similarly, if the plurality of blades are white and the eachof the inner circumferential surface 143 and the top surface 153 of therim 150 are of a darker color (e.g., black), the top circular plate 137will reflect comparatively more light. In an example, two of (1) theplurality of blades 138, (2) an inner circumferential surface 143 of theinlet unit 142 and the top surface 153 of the rim 150 of the inlet unit142, and (3) the top circular plate 137 have contrasting colors withrespect to each other. The top surface 113 of the circular protrusion115 is transparent (or at least translucent) and, as a result, therotating motion of the rotor portion 136 and the flow of the liquidinside the heat dissipating device 100 are observed. Further, the lightexits via the top surface 113 of the circular protrusion 115.

FIG. 8 illustrates a cross-sectional view of the heat dissipating device100 of FIG. 1 taken along the line 8-8. The cross-sectional viewillustrates the arrangement of the different components in the assembledstate of the heat dissipating device 100. As illustrated, sealingelements 181 (e.g., O-rings) are used at the interface of differentcomponents to create a liquid-tight seal and minimize leaks.

FIG. 9 schematically illustrates a circuit board 180 included in thelight assembly 118, according to embodiments disclosed. As illustrated,the circuit board 180 includes plurality of light sources 182, a powersupply 184, and a processor 186. The circuit board 180 is a printedcircuit board, a flexible circuit board, or the like, and is configured(e.g., has a shape and size) to be installed in the light assembly 118.In an example, the circuit board 180 has an annular or ring shapecorresponding to the shape of the light assembly 118. According toembodiments, the power supply 184 provides a DC source, which may be apower conversion circuit such as an AC-DC converter or a DC-DCconverter, a connection circuit for receiving power form an externalpower source (not shown) and transmitting the received power foron-board use, or a battery. The circuit board 180 not only supportsvarious electronic components disposed thereon but also includes variousconductive patterns for transmitting signals among the variouselectronic components. The plurality of light sources 182 are disposedon the circuit board 180, and each includes one or more light emittingdevices. The circuit board 180 is affixed to the light assembly 118, andis stationary with respect to rotation of the plurality of fan blades138. Stated otherwise, the plurality of light sources 182 are stationaryand independent from the rotation of the plurality of fan blades 138.

Although FIG. 9 shows that the various elements including the powersupply 184, the processor 186, and the plurality of light sources 182are disposed on a same surface of the circuit board 180, the presentdisclosure is not limited thereto. In some other embodiments, thevarious elements can be disposed on opposite surfaces of the circuitboard 180 for integration.

FIG. 10 shows a schematic circuit 1000 for controlling an operation ofthe plurality of light sources 182, according to embodiments disclosed.As illustrated, a power supply 188, motor control circuit 178, a motor192 (comprised of the stator portion 134 and rotor portion 136), theprocessor 186, and a plurality of light sources 182 (one shown) aredepicted in a schematic circuit. As an example, the light source 182 isdepicted as including red, green, and blue color light emitting devices191, 193, and 195. Alternatively or optionally, the plurality of lightsources 182 may include other light sources emitting other colors otherthan red, green, and blue. For example, the plurality of light sources182 may include white color and/or yellow color light sources. In anembodiment, one and only one light source 182 rather than a plurality oflight sources may be implemented. Although illustrated as separatecomponents, some of the components a power supply 188, motor controlcircuit 178, a motor 192, the processor 186, and a plurality of lightsources 182 may be combined into a single component. For instance, in anembodiment, the motor control circuit 178 may be integrated into theprocessor 186, and may collectively be referred to a processor 194.

The power supply 188 may be a power conversion circuit such as an AC-DCconverter or a DC-DC converter, a connection circuit for receiving powerfrom an external power source (not shown), or a battery. The powersupply 188 directly or indirectly supplies power to various electroniccomponents of the heat dissipating device 100 that require power,including, but not limited to, the motor control circuit 178, the motor192, the processor 186, and the plurality of light sources 182illustrated in FIG. 10.

The motor control circuit 178 provides a control signal such as a pulsewidth modulation (PWM) signal to control a rotational speed of the motor192 including the stator portion 134 and rotor portion 136 (FIGS. 4 and5). The motor control circuit 178 transmits to the processor 186 asignal indicative of the rotational speed of the motor 192 (or, morespecifically, the rotor portion 136). The motor control circuit 178 maybe configured to be an analog circuit, or a digital circuit, or acombination thereof, and may be implemented, for example, by amicroprocessor, an application-specific integrated circuit (ASIC), or afield-programmable gate array (FPGA).

The processor 186 receives the signal indicative of the rotational speedof the motor 192 from the motor control circuit 178, generates a controlsignal indicative of an on/off frequency of at least one of theplurality of light sources 182 based at least on the received rotationalspeed of the motor 192, and transmit the control signal to at least oneof the plurality of light sources 182. The received rotational speedfrom the motor control circuit 178 may be measured in revolutions perminute (rpm).

In an embodiment, the processor 186 is configured to generate thecontrol signal indicative of the on/off frequency of at least one of theplurality of light sources 182 using

$\begin{matrix}{f = {\frac{R}{60} \times N \times C}} & {{Equation}\mspace{14mu} (1)}\end{matrix}$

wherein, f is the on/off frequency of at least one of the plurality oflight sources 182, R is the received rotational speed of the motor 192in rpms, N is the number of the plurality of blades 138, and C is aconstant which can be a natural number in some embodiments.

The plurality of light sources 182 are simultaneously turned ON or OFFat the on/off frequency based on the control signal indicative of theon/off frequency provided by the processor 186. In some embodiments, thecontrol signal is applied to a pulse width modulation (PWM) circuit tomodulate the on/off frequency of one or more the plurality of lightsources 182. In an embodiment, the light sources 182 may illuminate theplurality of fan blades 138 and may be turned ON and OFF at thefrequency determined by the processor 186 based on Equation (1) suchthat the plurality of fan blades 138 may appear stationary to a user,although the fan blades 138 are rotating at a high speed. This staticdisplay may be obtained by controlling a value of C in Equation 1.

In an embodiment, each of the plurality of light sources 182 iscontrolled to turn on/off by a common control signal provided by theprocessor 186.

In another embodiment, the plurality of light sources 182 includes afirst group of light sources having a first color and which arecontrolled by a first control signal indicative of a first on/offfrequency provided by the processor 186, and a second group of lightsources having a second color and which are controlled by a secondcontrol signal indicative of a second different on/off frequencyprovided by the processor 186. In some embodiments, light sources 182 ofa same group may emit light having different colors. In anotherembodiment, only those light sources 182 controlled by the controlsignal provided the processor 186 are turned on/off at the determinedfrequency in one period which is long enough, for example, 0.5 second orlonger, and in such one period, all the other light sources aremaintained off.

Alternatively or optionally, the heat dissipating device 100 includes aspeed detector 196, which may include a light source and an opticalsensor, for detecting the rotational speed of the plurality of fanblades 138. The speed detector 196 can transmit a signal indicative ofthe detected rotational speed of the plurality of fan blades 138 to theprocessor 186 and/or the motor control circuit 178. The processor 186and/or the motor control circuit 178 can realize more accurate controlof the plurality of light sources 182 and the motor 192, based on thedetected real time rotational speed provided by the speed detector 196.

A non-restrictive example of illuminated fan blades 138 is shown in FIG.11A. In this case, the frequency of the light sources 182 is controlledusing Equation (1), in which C is 1, N is 5, R is 1500 rpms. The lightsources 182 are thus turned on/off at a frequency f determined to be 125Hz, and the user can observe a visually static view of 5 blades of thefan even though all the blades rotate at a speed of 1500 rpms.

In this case, the color of the light sources is controller at thedetermined frequency f such that the light sources 182 emit one colorfor a time period and the light sources 182 emit a different colorduring the successive time period. The user can thus observe 5 virtuallystatic blades in two different colors alternatively.

Another non-restrictive example of illuminating blades 138 is shown inFIG. 11B. In this case, N is 5, R is 1470 rpms, similar to the values inthe example of FIG. 4A discussed above; however, C is selected to be 2.The on/off frequency f thus is determined to be 250 Hz, two times theon/off frequency used in FIG. 11A.

As shown in FIG. 11B, the user can thus observe a virtually static viewof 10 blades, two times the total 5 blades of the fan, even though all 5blades rotate at a speed of 1500 rpms.

The two modes of operation discussed above can be alternated and theuser may periodically observe 5 blades and 10 blades. One of ordinaryskill in the art would appreciate that when the light sources 182 shownin FIG. 11B emit light having a different color from the color of thelight sources 182 shown in FIG. 4A, the user may periodically observevisually static 5 blades in one color and visually static 10 blades inanother different color.

It should be appreciated that in a case in which C is selected to beother natural numbers such as 3, 4, . . . , etc., a visually static viewof three times, four times, . . . etc., of the total 5 blades 138 willbe observed by the user.

In addition to generate the control signal indicative of the on/offfrequency of at least one of the plurality of light sources 182 based onEquation (1), the processor 186 is configured to generate the controlsignal indicative of the on/off frequency of at least one of theplurality of light sources 182 based on one of the following Equations(2) and (3):

$\begin{matrix}{f > {\frac{R}{60} \times N \times C}} & {{Equation}\mspace{14mu} (2)} \\{f < {\frac{R}{60} \times N \times C}} & {{Equation}\mspace{14mu} (3)}\end{matrix}$

wherein, f is the on/off frequency of at least one of the plurality oflight sources 182, R is the received rotational speed of the motor inrpms, N is the number of the fan blades 138, and C is a constant whichcan be a natural number. In a certain embodiment, f is determined by theprocessor 186 to be greater than R/60×N×C but not exceed (100%+a firstpredetermined percentage)×R/60×N×C in accordance with Equation (2) andless than R/60×N×C but no less than (100%−a second predeterminedpercentage)×R/60×N×C in accordance with Equation (3). The first andsecond predetermined percentage may be equal to 3% in some embodiments.

FIG. 12A shows an example based on Equation (2), in which C is 1, N is5, R is 1500 rpms, and the light sources are turned ON/OFF at afrequency f=128 Hz, slightly greater than 125 Hz (125=R/60×N×C), inwhich the user can observe 5 blades slowly rotating in a clockwisedirection even though all the 5 blades rotate at a speed of 1470 rpms.

FIG. 12B shows an example based on Equation (3), in which C is 1, N is5, R is 1470 rpms, and the light sources are turned on/off at afrequency f=119 Hz, slightly lower than 125 Hz (125=R/60×N×C), in whichthe user can observe 5 blades slowly rotating in an anticlockwisedirection even though all the fan blades rotate at a speed of 1500 rpms.

One of ordinary skill in the art would appreciate that two or more ofthe modes shown in FIGS. 12A-12B can be alternately operated.

Although in the modes shown in FIGS. 11A-12B, the light sources emitlight having the same color, in some other embodiments, the lightsources having different colors may be activated by control of theprocessor 186 upon receiving the user's selections or based on apredetermined order. Also, by controlling the color of the light fromthe light sources and the ON/OFF frequency of the light sources, theheat dissipating device 100 can emit colored light that ‘flashes’ at theON/OFF frequency and/or can emit a multi colored light (e.g., colors ofthe rainbow).

According to some embodiments, in a case in which the plurality of lightsources 182 can include the red, green, and blue color light sources191, 193, and 195, upon receiving, the user's selections indicating thattwo or more modes corresponding to those shown in FIGS. 11A-12B are tobe simultaneously provided by the rotor portion, from at least one of aninput or a receiver (or in a memory coupled to the processor 186,discussed below) which will be described later, during a same timeperiod, the processor 186 turns on/off a group of light sources emittinglight having one color selected from red, green, and blue colors at onefrequency satisfying Equation (1), turns on/off another group of lightsources emitting light having another color selected from red, green,and blue colors at another frequency satisfying Equation (2), and turnson/off a third group of light sources emitting light having a thirdcolor selected from red, green, and blue colors at a third frequencysatisfying Equation (3). In this case, when the user views the fan, theuser can simultaneously observe three modes corresponding to those shownin FIGS. 11A, 12A and 12B. For instance, in a case in which N is 5 and Ris 1500 rpms, the one color is red and the one frequency is 125 Hz, theanother color is green and the another frequency is 128 Hz, and thethird color is blue and the third frequency is 119 Hz, the user cansimultaneously observe 5 static red fan blades, 5 green blades slowlyrotating in an clockwise direction, 5 blue blades slowly rotating in ananticlockwise direction while the blades are rotating at 1500 rpms inreal time.

On the other hand, according to some other embodiments, during a sametime period, the processor 186 turns on/off the plurality of lightsources 182 emitting light having colors selected from red, green, andblue at different frequencies satisfying one of Equation (2) andEquation (3). In this case, the user can simultaneously observe threemodes corresponding to that shown in either FIG. 12A or FIG. 12B but atdifferent observable rotational speeds. For instance, in a case in whichN is 5 and R is 1500 rpms, the light sources emitting red light arecontrolled to be turned on/off at a frequency of 112 Hz, the lightsources emitting green light are controlled to be turned on/off at afrequency of 114 Hz, the light sources emitting blue light arecontrolled to be turned on/off at a frequency of 116 Hz, the user cansimultaneously observe 5 red, green, and blue fan blades slowly rotatingin an anticlockwise direction at different observable rotational speedswhile the blades are rotating at 1500 rpms in real time. In this case,the observable rotational speed of the red blades is the fastest one andthe observable rotational speed of the blue blades is the slowest one ofthe three observable rotational speeds.

In some embodiments, in a case the plurality of light sources 182include light sources emitting light having different colors, theplurality of blades 138 can display additional colors by color mixing.For example, the light sources emitting red and green light aresynchronously turned on/off according to one of the aforementionedmodes, the user can observe a mode in brown rather than a mode in red ora mode in green. For another example, the light sources emitting red andblue light are synchronously turned on/off according to one of theaforementioned modes, the user can observe a mode in purple rather thana mode in red or a mode in blue.

In various embodiments disclosed herein, the processor 186 shown in FIG.10 may be coupled to a memory (or other non-transitory machine readablerecording medium) (not shown) storing computer-executable instructions,which when executed, cause the processor 186 to perform the functionsdescribed above. These include functions described to receive the signalindicative of the rotational speed of the motor 192 from the motorcontrol circuit 178, to convert the rotational speed of the motor 192between different units of measurement, if required, to determine theon/off frequency of at least one of the plurality of light sources 182based on Equations (1), (2), and (3), and to transmit the signalindicative of the determined on/off frequency to the at least one of theplurality of light sources 182. The memory (not shown in the drawings)accessible to the processor 186, may store the number of fan blades 138and a default (or predetermined) value of C (which may be changed, ifdesired).

FIG. 13 shows flowchart of a method 1300 of controlling the heatdissipating device using the circuit illustrated in FIG. 10. Referringto FIGS. 10 and 13, the motor control circuit 178 drives the motor 192at a rotational speed and sends a signal indicative of the rotationalspeed of the motor 192 to the processor 186 (S1310).

The motor 192 rotates at the rotational speed determined by the motorcontrol circuit 178 (S1320). In this case, the plurality of fan blades138 thus rotate at the same rotational speed.

Based on the received rotational speed from the motor control circuit178, the process determines, for example, based on Equation (1),Equation (2), or Equation (3), an on/off frequency of the at least oneof the plurality of light sources 182, and transmits a control signalindicative of the determined frequency to the at least one of theplurality of light sources 182 (S1330).

The at least one of the plurality of light sources 182, to which thecontrol signal indicative of the determined frequency is configured tobe applied, is turned on/off at the determined frequency in response toa control by the control signal indicative of the determined frequency(S1340).

One of ordinary skill in the art would appreciate that although notshown in FIG. 13, additional steps similar to S1330 and S1340 may beperiodically performed before or after steps S1330 and S1340 so as toimplement various modes including, but not limited to, those shown inFIGS. 11A-12B with or without color changes. These features have beendiscussed with reference to FIG. 10 and will be omitted here to avoidredundancy.

FIG. 14 shows a schematic circuit 1400 of the heat dissipating device100, according to embodiments disclosed. The circuit 1400 may be similarin some respects to the circuit 1000 of FIG. 10 and, therefore, may bebest understood with reference thereto, where like numerals representlike element not described again.

The circuit 1400 includes an input 210. The input 210 may be a userinterface including one or more of a touchscreen, a touchpad, akeyboard, a button, and a knob, allowing the user to select a mode ofoperation, for example, by selecting a value of C indicating the numberof fan blades to be visually displayed and selecting a color of thelight sources which are associated with the selected value of C.Optionally, the input 210 may receive another input from the user toselect a rotational speed of the motor 192.

In some embodiments, the input 210 is configured to allow the user toinput various options to enable the motor to alternately work in variousmodes shown in FIGS. 4A-5B with or without color changes.

The motor control circuit 178 receives the input from the input 210 tocontrol the rotational speed of the motor 192.

The processor 186 receives, from the input 210, an input indicating themode of operation including a value of C indicating the number of fanblades to be visually displayed and the color of the light sources whichwill be turned on/off according to the frequency determined based atleast on the value of C. The processor 186 may receive a signalindicative of the rotational speed of the motor 192 from the motorcontrol circuit 178, or alternatively, may receive a signal indicativeof the rotational speed of the motor 192 selected by the user directlyfrom the input 210. Based on the received signals, the processor 186determines the on/off frequency of the selected light sources 182 andtransmits the determined on/off frequency to the respective lightsources 182.

One of ordinary skill in the art would appreciate that the heatdissipating device 100 can operate in a mode with a default value of Cset by the manufacturer or the user or operate in the last mode beforethe fan is turned off, in the event no input is provided to the input210.

FIG. 15 shows flowchart of a method 1500 of controlling the heatdissipating device 100 having the circuit 1400. As shown in FIG. 15, theinput 210 receives an input from the user indicating a mode of operationof the fan and transmits signals indicating the user input to theprocessor 186 and the motor control circuit 178 (S1501). Parametersrepresenting the mode of operation include, but are not limited to, atleast one of a value of C, a selection of visually static view of fanblades and visually slowly rotating view of fan blades (anticlockwise orclockwise), and a color of the light sources. Optionally, the input 210may receive another input from the user to select a rotational speed ofthe motor 192 (S301).

The motor control circuit 178 receives a signal indicating therotational speed of the motor 192 set by the user from the input 210 anddrives the motor 192 accordingly. The motor control circuit 178 maytransmit a signal indicating the rotational speed of the motor 192 tothe processor 186.

The processor 186 receives from the input 210 a signal indicating themode of operation of the fan set by the user. The processor 186 receivesa signal indicating the rotational speed from one of the input 210 andthe motor control circuit 178. Based on the received signals, theprocessor 186 determines the on/off frequency based on one of Equations(1), (2), and (3), and transmits the determined on/off frequency to thecorresponding light sources (S1331).

Descriptions of steps S1320 and S1330 may be referred to thedescriptions with reference to FIG. 13 and therefore will be omitted forthe sake of brevity.

FIG. 16 shows a schematic circuit 1600 of the heat dissipating device100, according to embodiments of the present disclosure. The circuit1600 may be similar in some respects to the circuit 1400 of FIG. 14 and,therefore, may be best understood with reference thereto, where likenumerals represent like element not described again.

The circuit 1600 includes a receiver 220, which may be an infraredreceiver or a wireless receiver configured to have a communication chipfor receiving a BLUETOOTH signal, a WI-FI signal, and/or a cellularsignal, receives a wireless signal indicating a remote input made by theuser through, for example, by a remote controller or a smart portabledevice such as a smart phone. The remote input by the user may bereferred to the user input discusses with reference to FIG. 14 and willnot be repeated here.

The motor control circuit 178 and the processor 186 are configured toreceive the corresponding signals from the receiver 220, similar to acase in which the motor control circuit 178 110 and the processor 186are configured to receive the corresponding signals from the input 210as shown in FIG. 13.

FIG. 17 shows a flowchart of a method 1700 of controlling the heatdissipating device 100 having the circuit 1600 shown in FIG. 16. Themethod 1700 may be similar in some respects to the method 1500 of FIG.15 and, therefore, may be best understood with reference thereto, wherelike numerals represent like element not described again.

The method 1700 is the same as that shown in FIG. 15, except that thereceiver 220, rather than the input 210, receives signals indicating theuser's selection and transmits the received signals to the processor 186and the motor control circuit 178 (see S1702).

FIG. 18 shows a schematic circuit 1800 of the heat dissipating device100, according to embodiments of the present disclosure. The circuit1800 may be similar in some respects to the circuit 1400 and 1600 ofFIGS. 14 and 16 and, therefore, may be best understood with referencethereto, where like numerals represent like element not described again.

In circuit 1800 both the input 210 and the receiver 220 are implementedin the heat dissipating device 100

FIG. 19 shows a flow chart of a method 1900 of controlling the heatdissipating device 100 having the circuit 1800 of FIG. 18.

The method 1900 is the same as the methods 1500 and 1700 shown in FIG.15 and FIG. 17, except that the receiver 220 and/or the input 210receive signals and/or inputs indicating user's selection and transmitcorresponding signals to the processor 186 and the motor control circuit178 (S1903).

FIG. 20 shows a modified circuit 2000 of a heat dissipating device 100according to embodiments of the present disclosure, based on the circuit1800 of the heat dissipating device 100 shown in FIG. 18. The circuit2000 may be similar in some respects to the circuit 1800 of FIG. 18 and,therefore, may be best understood with reference thereto, where likenumerals represent like element not described again.

Referring to FIG. 20, at least one of the receiver 220 and the input 210transmits a signal indicating a rotational speed of the motor 192 to theprocessor 1186, rather than to the motor control circuit 178 as shown inFIG. 18. In this case, the processor 186 transmits the received signalindicating the rotational speed of the motor 192 to the motor controlcircuit 178 to enable the motor control circuit 178 to drive the motor192 to rotate according to the received rotational speed. In someembodiments, one or both of the receiver 220 and the input 210 areomitted.

FIG. 21 shows flowchart of a method 2100 of controlling the heatdissipating device 100 having the circuit 2000 shown in FIG. 20.

The method 2100 shown in FIG. 21 is substantially the same as that shownin FIG. 19, except that the processor 186 receives (S1903) a signalindicating a rotational speed of the motor 192 and transmits (S2108) thereceived signal to the motor control circuit 178 for driving (S2109) themotor 192.

FIG. 22 illustrates a heat dissipating device 2200, according toembodiments disclosed. The heat dissipating device 2200 is similar insome respects to the heat dissipating device 100 of FIG. 1 and,therefore, is best understood with reference thereto, where likenumerals represent like elements not described again. As illustrated,the cover 112 of the heat dissipating device 2200 includes two elongatedslots 2202 located diametrically opposite each other adjacent the topsurface 121. However, in other embodiments, more than two slots 2202 areincluded in the cover 112. The slots 202 are located at regularintervals or at random intervals in the cover 112.

FIGS. 23 and 24 illustrate exploded views of the heat dissipating device2200, according to embodiments disclosed. The heat dissipating device2200 includes a light guide 2203 having curved protrusions 2204extending radially outward from the outer circumferential end of thelight guide 2203. Each curved protrusion 2204 is sized to be received inthe corresponding slot 2202. When assembled, the end surface 2206 of thecurved protrusions 2204 is flush with the outer circumferential surface128 of the cover 112. During operation, light from the light emittingdevices is also emitted from the sides of the outer cover 112 due to thelight guide 203.

FIG. 25 illustrates a cross-sectional view of the heat dissipatingdevice 2200 of FIG. 9 taken along the line 25-25. The cross-sectionalview illustrates the arrangement of the different components in theassembled state of the heat dissipating device 2200. As illustrated, theend surface 2206 of the curved protrusions 2204 is flush with the outercircumferential surface 128 of the cover 112.

FIG. 26 illustrates a heat dissipating device 2600, according toembodiments disclosed. The heat dissipating device 2600 is similar insome respects to the heat dissipating devices 100 and 2200 of FIGS. 1and 22, and, therefore, is best understood with reference thereto, wherelike numerals represent like elements not described again. The heatdissipating device 2600 includes openings 2602 located diametricallyopposite each other adjacent a lower end of the cover 112. However, inother embodiments, more than two openings 2602 are included in the cover112. The openings 2602 are located at regular intervals or at randomintervals in the cover 112.

FIGS. 27 and 28 illustrate exploded views of the heat dissipating device2600, according to embodiments disclosed. The bottom assembly 102includes a second light guide 2604 that is received in the openings2602.

FIG. 29 illustrates an exploded view of the bottom assembly 102illustrating the second light guide 2604 in greater detail, according toembodiments disclosed. The second light guide 2604 is disposed on theheat exchange unit 110 and is made of two parts (or pieces) 2606 thatare sized or otherwise configured to be received in the correspondingopenings 2602. As illustrated the two parts 2606 are curved. The bottomassembly 102 also includes a second light assembly 2608 arranged on thesecond light guide 2604. The second light assembly 2608 is C-shaped toaccommodate the inlet 104 and outlet 106 of the heat dissipating device300. The second light assembly 2608 includes a plurality of lightemitting devices. The light emitting devices are arranged at regularintervals along the second light assembly 2608. However, in someembodiments, the light emitting devices are arranged at irregularintervals, without departing from the scope of the disclosure.

FIGS. 30 and 31 illustrate the second light assembly 2608 and the secondlight guide 2604 separated from the heat exchange unit 110.

FIG. 32 illustrates a cross-sectional view of the heat dissipatingdevice 2600 of FIG. 26 taken along the line 32-32. The cross-sectionalview illustrates the arrangement of the different components in theassembled state of the heat dissipating device 2600. As illustrated, theradially outer surfaces 2607 of the parts 2606 are received in theopenings 2602 and are flush with the outer circumferential surface 128of the cover 112. During operation, light from the light emittingdevices is also emitted from the top and bottom of the outer cover 112due to the light guides 2203 and 2604.

Therefore, embodiments disclosed herein are well adapted to attain theends and advantages mentioned as well as those that are inherenttherein. The particular embodiments disclosed above are illustrativeonly, as the embodiments disclosed may be modified and practiced indifferent but equivalent manners apparent to those skilled in the arthaving the benefit of the teachings herein. Furthermore, no limitationsare intended to the details of construction or design herein shown,other than as described in the claims below. It is therefore evidentthat the particular illustrative embodiments disclosed above may bealtered, combined, or modified and all such variations are consideredwithin the scope and spirit of the present disclosure. The embodimentsillustratively disclosed herein suitably may be practiced in the absenceof any element that is not specifically disclosed herein and/or anyoptional element disclosed herein. While compositions and methods aredescribed in terms of “comprising,” “containing,” or “including” variouscomponents or steps, the compositions and methods can also “consistessentially of” or “consist of” the various components and steps. Allnumbers and ranges disclosed above may vary by some amount. Whenever anumerical range with a lower limit and an upper limit is disclosed, anynumber and any included range falling within the range is specificallydisclosed. In particular, every range of values (of the form, “fromabout a to about b,” or, equivalently, “from approximately a to b,” or,equivalently, “from approximately a-b”) disclosed herein is to beunderstood to set forth every number and range encompassed within thebroader range of values. Also, the terms in the claims have their plain,ordinary meaning unless otherwise explicitly and clearly defined by thepatentee. Moreover, the indefinite articles “a” or “an,” as used in theclaims, are defined herein to mean one or more than one of the elementthat it introduces.

What is claimed is:
 1. A heat dissipating device, comprising: a bottomassembly; a first light guide positioned on the bottom assembly; a firstlight assembly positioned on the first light guide; and an outer coverpositioned on the bottom assembly and at least partially enclosing thebottom assembly, the first light guide, and the first light assembly,wherein: the outer cover defines a first opening on a top surfacethereof, at least a portion of the first light guide is received in thefirst opening, and light from the first light assembly is emitted fromthe heat dissipating device through the exposed portion of the firstlight guide.
 2. The heat dissipating device of claim 1, wherein thebottom assembly includes a pumping unit positioned on a heat exchangeunit and fluidly coupled thereto, wherein the pumping unit includes: aninlet unit fluidly coupled to an inlet of the heat dissipating device, abase including a stator portion and a rotor portion, wherein: the inletunit is positioned on the base, and the inlet unit and the basecooperatively define a pump chamber, the pump chamber including thestator portion and the rotor portion, and the pump chamber being fluidlycoupled to the inlet unit.
 3. The heat dissipating device of claim 2,wherein the rotor portion includes a plurality of blades that are curvedopposite to a direction of rotation of the rotor portion.
 4. The heatdissipating device of claim 2, wherein the rotor portion includes aplurality of blades disposed on a top circular plate of the rotorportion, and wherein the plurality of blades and the top circular platehave contrasting colors with respect to each other.
 5. The heatdissipating device of claim 2, wherein the rotor portion includes aplurality of blades disposed on a top circular plate of the rotorportion, and wherein the top circular plate has a contrasting color withrespect to each of an inner circumferential surface of the inlet unitand a top surface of a rim of the inlet unit.
 6. The heat dissipatingdevice of claim 2, wherein the rotor portion includes a plurality ofblades disposed on a top circular plate of the rotor portion, andwherein the plurality of blades have a contrasting color with respect toeach of an inner circumferential surface of the inlet unit and a topsurface of a rim of the inlet unit.
 7. The heat dissipating device ofclaim 2, wherein the heat exchange unit includes: a base plateconfigured to dissipate heat and including a heat exchanger; a sealingcover coupled to the base plate and at least partially enclosing theheat exchanger, the sealing cover and the base plate defining a heatexchange chamber that includes the heat exchanger, the sealing coverdefining a second opening positioned above the heat exchange unit; and acover plate coupled to the base plate, the cover plate including: anoutlet of the heat dissipating device, a third opening in fluidcommunication with the heat exchange chamber through the second opening,and a fourth opening defined adjacent the outlet, wherein the fourthopening is in fluid communication with the outlet, and is in fluidcommunication with the heat exchange chamber through the second opening.8. The heat dissipating device of claim 2, further comprising a liquidguiding unit disposed in the inlet unit and configured to guide liquidto the pumping chamber.
 9. The heat dissipating device of claim 1,wherein: the first light guide includes a circular protrusion on anupper surface of the first light guide, the circular protrusion isreceived in the first opening; and the first light assembly is annularand disposed about the circular protrusion.
 10. The heat dissipatingdevice of claim 1, wherein: the outer cover includes an elongated slotdefined on an outer circumferential surface thereof, and the first lightguide includes a curved protrusion extending radially from an outercircumferential end of the first light guide, wherein: the curvedprotrusion is received in the elongated slot, and an end surface of thecurved protrusion is flush with the outer circumferential surface of theouter cover.
 11. The heat dissipating device of claim 10, furthercomprising a second light guide disposed in the bottom assembly, whereinthe outer cover defines a second opening and a third opening on theouter circumferential surface thereof, and the second light guide isreceived in the second opening and the third opening.
 12. The heatdissipating device of claim 11, wherein the second light guide includesa first curved part and a second curved part each received in acorresponding one of the second opening and the third opening, andwherein radially outer surfaces of each of the first and second curvedparts are flush with the outer circumferential surface of the outercover.
 13. The heat dissipating device of claim 11, further comprising asecond light assembly disposed on the second light guide.
 14. The heatdissipating device of claim 1, further comprising a glass coverpositioned between the bottom assembly and the first light guide. 15.The heat dissipating device of claim 1, wherein the outer cover is atleast in part translucent.
 16. The heat dissipating device of claim 1,further comprising a processor controlling a first light source in thefirst light assembly to turn on/off at a first frequency determined atleast based on a rotational speed of a plurality of blades of a motor ofthe heat dissipating device.
 17. The heat dissipating device of claim16, wherein the processor determines the first frequency in accordanceone of the Equations${f = {\frac{R}{60} \times N \times C}},{f > {\frac{R}{60} \times N \times C\mspace{14mu} {and}\mspace{14mu} f} < {\frac{R}{60} \times N \times C}},$wherein f is the first frequency, R is the rotational speed inrevolutions per minute, N is number of the plurality of blades, and C isa natural number.
 18. The heat dissipating device of claim 17, furthercomprising an input receiving a first input to enable the processor tochange the value of C in accordance with the first user input or apredetermined value.
 19. The heat dissipating device of claim 18,wherein the processor updates, based on Equation (1), the firstfrequency f based on a change in the value of C.
 20. The heatdissipating device of claim 18, wherein rotational speed of theplurality of blades is varied based on a second input.
 21. The heatdissipating device of claim 20, wherein the processor updates the firstfrequency based on a change in the rotational speed of the plurality ofblades.
 22. The heat dissipating device of claim 16, wherein theprocessor is configured, while maintaining the rotational speed of theplurality of blades, to control the first light source to turn on/off ata frequency which is higher or lower than the first frequency.
 23. Theheat dissipating device of claim 16, wherein the light assemblycomprises a second light source configured to emit light having a colordifferent from that of the first light source, and wherein the processorindependently controls at least one of the first light source and thesecond light source.
 24. The heat dissipating device of claim 23,wherein the processor controls at least one of the first light sourceand the second light source to turn on/off at the first frequency for afirst time period and controls at least one of the first and secondlight sources to turn on/off at a second frequency for a second timeperiod, wherein the first and second time periods are successive. 25.The heat dissipating device of claim 23, wherein, during a same period,the processor controls the first light source to turn on/off at thefirst frequency and controls the second light source to turn on/off at asecond frequency different from the first frequency.
 26. The heatdissipating device of claim 25, wherein the first frequency is equal toR/60×N×C, wherein R is the rotational speed in revolutions per minute, Nis number of the plurality of blades, and C is a natural number.
 27. Theheat dissipating device of claim 25, wherein none of the first frequencyand the second frequency is equal to R/60×N×C, wherein which R is therotational speed in revolutions per minute, N is number of the pluralityof blades, and C is a natural number.
 28. The heat dissipating device ofclaim 23, wherein, during a same period, the processor controls thefirst light and second sources to turn on/off at the first frequency.29. A heat dissipating device, comprising: a bottom assembly; a firstlight guide positioned on the bottom assembly and including a circularprotrusion on an upper surface thereof and two curved protrusionsextending radially from an outer circumferential end of the first lightguide; a first light assembly positioned on the first light guide; andan outer cover positioned on the bottom assembly and at least partiallyenclosing the bottom assembly, the first light guide, and the firstlight assembly, wherein: the outer cover defines a first opening on atop surface thereof, and defines a second opening and a third opening onan outer circumferential surface of the outer cover and adjacent the topsurface, at least a portion of the first light assembly is received inthe first opening, the two curved protrusions are received in acorresponding one of the second opening and the third opening, and lightfrom the first light assembly is emitted from the heat dissipatingdevice through the portion of the first light assembly in the firstopening and through the two curved protrusions.
 30. The heat dissipatingdevice of claim 29, wherein end surfaces of the two curved protrusionare flush with the outer circumferential surface of the outer cover. 31.The heat dissipating device of claim 29, wherein a top surface of thecircular protrusion is flush with the top surface of the outer cover.32. The heat dissipating device of claim 29, wherein the bottom assemblyincludes a pumping unit positioned on a heat exchange unit and fluidlycoupled thereto, wherein the pumping unit includes: an inlet unitfluidly coupled to an inlet of the heat dissipating device; and a baseincluding a stator portion and a rotor portion, the rotor portionincluding a plurality of blades disposed on a top circular plate of therotor portion, and wherein the plurality of blades and the top circularplate have contrasting colors with respect to each other.
 33. The heatdissipating device of claim 29, wherein the bottom assembly includes apumping unit positioned on a heat exchange unit and fluidly coupledthereto, wherein the pumping unit includes: an inlet unit fluidlycoupled to an inlet of the heat dissipating device; and a base includinga stator portion and a rotor portion, the rotor portion including aplurality of blades disposed on a top circular plate of the rotorportion, and wherein the top circular plate has a contrasting color withrespect to each of an inner circumferential surface of the inlet unitand a top surface of a rim of the inlet unit.
 34. The heat dissipatingdevice of claim 29, wherein the bottom assembly includes a pumping unitpositioned on a heat exchange unit and fluidly coupled thereto, whereinthe pumping unit includes: an inlet unit fluidly coupled to an inlet ofthe heat dissipating device; and a base including a stator portion and arotor portion, the rotor portion including a plurality of bladesdisposed on a top circular plate of the rotor portion, and wherein theplurality of blades have a contrasting color with respect to each of aninner circumferential surface of the inlet unit and a top surface of arim of the inlet unit.
 35. A heat dissipating device, comprising: abottom assembly; a first light guide positioned on the bottom assemblyand including a circular protrusion on an upper surface thereof and twocurved protrusions extending radially from an outer circumferential endof the first light guide; a first light assembly positioned on the firstlight guide; a second light guide including a first curved part and asecond curved part each disposed in the bottom assembly; a second lightassembly disposed on the second light guide; and an outer coverpositioned on the bottom assembly and at least partially enclosing thebottom assembly, the first light guide, the first light assembly, thesecond light guide, and the second light assembly, wherein: the outercover defines a first opening on a top surface thereof, a second openingand a third opening on an outer circumferential surface of the outercover and adjacent the top surface, and a fourth opening and a fifthopening on the outer circumferential surface of the outer cover andadjacent a lower end of the outer cover, at least a portion of the firstlight assembly is received in the first opening, the two curvedprotrusions are received in a corresponding one of the second openingand the third opening, the first and second curved parts are received ina corresponding one of the fourth opening and the fifth opening, andlight from the first light assembly is emitted from the heat dissipatingdevice through the portion of the first light assembly in the firstopening, through the two curved protrusions, and through the first andsecond curved parts.
 36. The heat dissipating device of claim 35,wherein radially outer surfaces of each of the first and second curvedparts are flush with the outer circumferential surface of the outercover.
 37. The heat dissipating device of claim 35, wherein end surfacesof the two curved protrusion are flush with the outer circumferentialsurface of the outer cover.
 38. The heat dissipating device of claim 35,wherein a top surface of the circular protrusion is flush with the topsurface of the outer cover.
 39. The heat dissipating device of claim 35,wherein the bottom assembly includes a pumping unit positioned on a heatexchange unit and fluidly coupled thereto, wherein the pumping unitincludes: an inlet unit fluidly coupled to an inlet of the heatdissipating device; and a base including a stator portion and a rotorportion, the rotor portion including a plurality of blades disposed on atop circular plate of the rotor portion, and wherein the plurality ofblades and the top circular plate have contrasting colors with respectto each other.
 40. The heat dissipating device of claim 35, wherein thebottom assembly includes a pumping unit positioned on a heat exchangeunit and fluidly coupled thereto, wherein the pumping unit includes: aninlet unit fluidly coupled to an inlet of the heat dissipating device;and a base including a stator portion and a rotor portion, the rotorportion including a plurality of blades disposed on a top circular plateof the rotor portion, and wherein the top circular plate has acontrasting color with respect to each of an inner circumferentialsurface of the inlet unit and a top surface of a rim of the inlet unit.41. The heat dissipating device of claim 35, wherein the bottom assemblyincludes a pumping unit positioned on a heat exchange unit and fluidlycoupled thereto, wherein the pumping unit includes: an inlet unitfluidly coupled to an inlet of the heat dissipating device; and a baseincluding a stator portion and a rotor portion, the rotor portionincluding a plurality of blades disposed on a top circular plate of therotor portion, and wherein the plurality of blades have a contrastingcolor with respect to each of an inner circumferential surface and a topsurface of a rim of the inlet unit.
 42. A heat dissipating device,comprising: a bottom assembly; a first light guide positioned on thebottom assembly; a first light assembly positioned adjacent acircumferential end surface of the first light guide; and an outer coverpositioned on the bottom assembly and at least partially enclosing thebottom assembly, the first light guide, and the first light assembly,wherein: the outer cover defines a first opening on a top surfacethereof, at least a portion of the first light guide is received in thefirst opening, and light from the first light assembly is emitted fromthe heat dissipating device through the portion of the first light guidereceived in the first opening.
 43. The heat dissipating device of claim42, wherein the bottom assembly includes a pumping unit positioned on aheat exchange unit and fluidly coupled thereto, wherein the pumping unitincludes: an inlet unit fluidly coupled to an inlet of the heatdissipating device; and a base including a stator portion and a rotorportion, the rotor portion including a plurality of blades disposed on atop circular plate of the rotor portion, and wherein the plurality ofblades and the top circular plate have contrasting colors with respectto each other.
 44. The heat dissipating device of claim 42, wherein thebottom assembly includes a pumping unit positioned on a heat exchangeunit and fluidly coupled thereto, wherein the pumping unit includes: aninlet unit fluidly coupled to an inlet of the heat dissipating device;and a base including a stator portion and a rotor portion, the rotorportion including a plurality of blades disposed on a top circular plateof the rotor portion, and wherein the top circular plate has acontrasting color with respect to each of an inner circumferentialsurface of the inlet unit and a top surface of a rim of the inlet unit.45. The heat dissipating device of claim 42, wherein the bottom assemblyincludes a pumping unit positioned on a heat exchange unit and fluidlycoupled thereto, wherein the pumping unit includes: an inlet unitfluidly coupled to an inlet of the heat dissipating device; and a baseincluding a stator portion and a rotor portion, the rotor portionincluding a plurality of blades disposed on a top circular plate of therotor portion, and wherein the plurality of blades have a contrastingcolor with respect to each of an inner circumferential surface of theinlet unit and a top surface of a rim of the inlet unit.
 46. A heatdissipating device, comprising: a bottom assembly; a first light guidepositioned on the bottom assembly; a first light assembly positioned onthe first light guide; and an outer cover positioned on the bottomassembly and at least partially enclosing the bottom assembly, the firstlight guide, and the first light assembly, wherein: the outer coverdefines a first opening on a top surface thereof, at least a portion ofthe first light guide is received in the first opening, and light fromthe first light assembly is emitted from the heat dissipating devicethrough the exposed portion of the first light guide, the bottomassembly includes: an inlet unit fluidly coupled to an inlet of the heatdissipating device; and a base including a stator portion and a rotorportion, the rotor portion including a plurality of blades disposed on atop circular plate of the rotor portion, and wherein two of (1) theplurality of blades, (2) an inner circumferential surface of the inletunit and a top surface of a rim of the inlet unit, and (3) the topcircular plate have contrasting colors with respect to each other.